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Food and Nutrition - What is Cooking: Methods and Utensils

Grade 3CBSE

Review the key concepts, formulae, and examples before starting your quiz.

🔑Concepts

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Cooking is the process of applying heat to food to make it soft, tasty, and easy to digest.

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Cooking kills harmful germs and bacteria present in raw food, making it safe to eat.

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Boiling: Cooking food in water at a high temperature, usually 100∘C100^\circ C (e.g., rice, potatoes).

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Steaming: Cooking food using the steam produced by boiling water (H2OH_2O in gaseous state). This is considered a healthy method as it preserves nutrients (e.g., idli, momos).

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Frying: Cooking food in hot oil or ghee. It can be Deep Frying (e.g., puris), Shallow Frying (e.g., parathas), or Stir Frying (e.g., noodles).

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Baking: Cooking food in an oven without adding extra liquid or oil directly (e.g., cakes, bread, biscuits).

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Roasting: Cooking food over an open fire or in a dry pan (e.g., corn, papad, peanuts).

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Utensils: Various tools used in the kitchen like pressure cookers, frying pans, tawas, and ladles. They are made from materials like stainless steel, aluminum, copper, or clay.

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Fuels: Energy sources used for cooking include LPG (Liquefied Petroleum Gas), electricity (induction), wood, coal, and solar energy.

📐Formulae

Boiling Point of H2O=100∘C\text{Boiling Point of } H_2O = 100^\circ C

Water (liquid)+Heat→Steam (gas)\text{Water (liquid)} + \text{Heat} \rightarrow \text{Steam (gas)}

Raw Food+Heat→Cooked Food (Chemical Change)\text{Raw Food} + \text{Heat} \rightarrow \text{Cooked Food (Chemical Change)}

💡Examples

Problem 1:

Riya wants to make a cake. Which method of cooking should she use, and what is the common temperature unit used in ovens?

Solution:

Baking; Degrees Celsius (∘C^\circ C) or Fahrenheit (∘F^\circ F).

Explanation:

Cakes are prepared using dry heat in an oven, which is called baking. Temperature is measured in ∘C^\circ C to ensure the cake cooks evenly.

Problem 2:

Why is a pressure cooker used to cook pulses faster?

Solution:

It uses steam pressure to increase the boiling point of water.

Explanation:

A pressure cooker traps steam, which increases the internal pressure and temperature, allowing food to cook much faster than in an open pot.

Problem 3:

Identify the odd one out: Frying, Steaming, Boiling, Cutting.

Solution:

Cutting.

Explanation:

Frying, steaming, and boiling are methods of cooking that involve heat, whereas cutting is a method of food preparation that does not require heat.

What is Cooking: Methods and Utensils Revision - Class 3 Science CBSE